Switching to VoIP

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Timing Trunk Transitions

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While tail is following the logfile, call each of the numbers that cause distinctive

rings on your POTS lines. When the POTS interface senses the ring pattern, a log

entry will appear containing Asterisk’s representation of it: a string of digits has three

values separated by commas. Each digit represents a duration of ringing, such that

each ring pattern could have up to three rings of varying length in a 1- or 2-second

timespan. The pattern repeats at regular intervals until the call is answered.

The string representing this pattern is used to supply a value to the

dring argument

in zapata.conf. Repeat this process until you’ve identified the strings needed for each

of the phone numbers associated with your POTS line. Here’s a sample config in

zapata.conf that describes two distinctive ring signals and assigns them different con-

texts in the dial-plan:

usedistinctiveringdetection=yes

dring1=325,95,0

dring2=95,0,0

dringcontext1=TedsCalls

dringcontext2=JakesCalls

channel =>1

Distinctive ring features outside North America can use caller ID sig-

naling instead of ring pattern signaling to indicate which phone num-

ber is being called. Check with your telephone company to see how it

supports distinctive ring.

Routing based on distinctive ring

The Zaptel channel’s ...